https://chronometerbook.com/2016/10/08/0-list-of-posts/2020-10-03T22:34:30+00:00monthlyhttps://chronometerbook.com/2020/10/03/39-a-late-thomas-mercer-chronometer/2020-10-03T22:32:39+00:00monthlyhttps://chronometerbook.com/2020/04/19/38-a-kelvin-and-james-white-chronometer-overhauled/https://chronometerbook.com/wp-content/uploads/2020/04/o-haul-dates.jpgO haul datesOverhaul dates.https://chronometerbook.com/wp-content/uploads/2020/04/needle-holder-001.jpgNeedle holder 001Figure 11: Modified needle holder.https://chronometerbook.com/wp-content/uploads/2020/04/aux-comp-screw.jpgAux comp screwFigure 9: Broken auxiliary compensation screw.https://chronometerbook.com/wp-content/uploads/2020/04/aux-comp-side.jpgAux comp sideFigure 9: Auxiliary temperature compensation, side view.https://chronometerbook.com/wp-content/uploads/2020/04/aux-comp-2.jpgAux comp 2Figure 8: Auxiliary temperature compensation.https://chronometerbook.com/wp-content/uploads/2020/04/e-wheel-pivot-1.jpgE wheel pivotFigure 7: Upper escape wheel pivot.https://chronometerbook.com/wp-content/uploads/2020/04/detent-ga.jpgDetent GAFigure 6: Passing spring side of detent.https://chronometerbook.com/wp-content/uploads/2020/04/copy-of-detent-not-passing.jpgCopy of Detent not passingFigure 5: Horn side of "English" detenthttps://chronometerbook.com/wp-content/uploads/2020/04/pillar-rivet.jpgPillar rivetFigure 4: Rivetted pillars and punch marks, bottom plate.https://chronometerbook.com/wp-content/uploads/2020/04/bottom-plate.jpgBottom plateFigure 3: Condition of bottom plate.2020-04-19T08:36:24+00:00monthlyhttps://chronometerbook.com/2020/01/25/37-a-makeshift-oven-to-rate-chronometers/https://chronometerbook.com/wp-content/uploads/2020/01/oven-002.jpgOven 002Figure 2: Interior of enclosure.https://chronometerbook.com/wp-content/uploads/2020/01/oven-001.jpgOven 001Figure 1: Power supplies and control unit.2020-04-17T23:43:49+00:00monthlyhttps://chronometerbook.com/2019/09/18/usher-and-coles-finest/https://chronometerbook.com/wp-content/uploads/2019/09/u-and-c-rate-2-2.jpegU and C rate 2Figure 16: Rate over 5 days.https://chronometerbook.com/wp-content/uploads/2019/09/copy-of-aux-comp-1-1.jpgCopy of Aux comp 1Figure 15: Auxiliary compensation.https://chronometerbook.com/wp-content/uploads/2019/09/stop-work-lab.jpgStop work labFigure 14: Fusee iron.https://chronometerbook.com/wp-content/uploads/2019/09/fusee-snail.jpgOLYMPUS DIGITAL CAMERAFigure 13: Fusee snail.https://chronometerbook.com/wp-content/uploads/2019/09/face-under-bezel-1.jpgFace under bezelFigure 12: Re-silvered dial.https://chronometerbook.com/wp-content/uploads/2019/09/usher-and-cole-009-1.jpgUsher and Cole 009Figure 10: Spring maker's mark.https://chronometerbook.com/wp-content/uploads/2019/09/broken-mainspring.jpgBroken mainspringFigure 9: Mainspring, barrel and arbor.https://chronometerbook.com/wp-content/uploads/2019/09/english-detent.jpegEnglish detentFigure 5: Means of mounting "English" detent.https://chronometerbook.com/wp-content/uploads/2019/09/face-under-bezel.jpgFace under bezelhttps://chronometerbook.com/wp-content/uploads/2019/09/top-plate-ga.jpgTop plate GAFigure 11: View of top plate.2019-12-04T20:12:54+00:00monthlyhttps://chronometerbook.com/2019/01/10/36-a-post-ww-ii-glashutte-chronometer/https://chronometerbook.com/wp-content/uploads/2019/01/mitre.jpgmitreFigure 15: Cross section of keyed mitre joint.https://chronometerbook.com/wp-content/uploads/2019/01/11-bowl-and-gimbals.jpgOLYMPUS DIGITAL CAMERAFigure 14: Bowl and gimbalshttps://chronometerbook.com/wp-content/uploads/2019/01/case.jpgcaseFigure 15: Chronometer in its case.https://chronometerbook.com/wp-content/uploads/2019/01/top-plate-mx6-001-1.jpgtop plate mx6 001Figure 7: Position of pillar holes.https://chronometerbook.com/wp-content/uploads/2019/01/detent.jpgdetentFigure 13: Detent.https://chronometerbook.com/wp-content/uploads/2019/01/5-geneva-in-situ.jpg5 geneva in situFigure 12: top work in place.https://chronometerbook.com/wp-content/uploads/2019/01/4-geneva-1.jpg4 geneva 1Figure 9: Geneva stop work.https://chronometerbook.com/wp-content/uploads/2019/01/9-band.jpg9 bandFigure 9: Driving band and hooks.https://chronometerbook.com/wp-content/uploads/2019/01/8-band-in-situ.jpg8 band in situFigure 10: Driving band in place.https://chronometerbook.com/wp-content/uploads/2019/01/2-pillars.jpg2 pillarsFigure 6: Pillars.2019-01-10T04:07:01+00:00monthlyhttps://chronometerbook.com/2018/12/27/yet-more-on-making-a-detent/https://chronometerbook.com/wp-content/uploads/2018/12/Finished.jpgFinishedFigure 8: Finished detent.https://chronometerbook.com/wp-content/uploads/2018/12/pop-and-polish.jpgOLYMPUS DIGITAL CAMERAFigure 7: Detent embedded in POP to polish.https://chronometerbook.com/wp-content/uploads/2018/12/Jig-and-pop-cut-done.jpgJig and pop cut doneFigure 6: Appearance of milled surface.https://chronometerbook.com/wp-content/uploads/2018/12/Jig-and-cutter.jpgJig and cutterFigure 5: Milling cutter in actionhttps://chronometerbook.com/wp-content/uploads/2018/12/Jig-and-pop.jpgJig and popFigure 4: Plaster of Paris applied.https://chronometerbook.com/wp-content/uploads/2018/12/On-jig-no-pop.jpgOn jig no popFigure 3: Detent attached to jig.https://chronometerbook.com/wp-content/uploads/2018/12/Jig.jpgJigFigure 2: Rear of jighttps://chronometerbook.com/wp-content/uploads/2018/12/Detent-jig-drwg.jpgDetent jig drwgFigure 1: Drawing of jig.2018-12-28T02:41:03+00:00monthlyhttps://chronometerbook.com/about/https://chronometerbook.com/wp-content/uploads/2013/03/blog-header-003.jpgBlog header 003"The Mariner's Chronometer" alongside an MX6 chronometer2018-10-10T21:09:45+00:00weekly0.6https://chronometerbook.com/2018/09/26/33-more-on-making-a-detent/https://chronometerbook.com/wp-content/uploads/2018/09/copy-of-einheitschronometer-drwg1.jpgCopy of Einheitschronometer drwgFigure 2: Drawing of Einheits-Chronometer detent.https://chronometerbook.com/wp-content/uploads/2018/09/jig-detent-finished.jpgJig detent finishedFigure 9: Finished detent.https://chronometerbook.com/wp-content/uploads/2018/09/jig-swing-tool.jpgJig swing toolFigure 7: Jig in swing tool.https://chronometerbook.com/wp-content/uploads/2018/09/jig-grinder.jpgJig grinderFigure 6: Jig on surface grinder chuck.https://chronometerbook.com/wp-content/uploads/2018/09/jig-against-protodetent.jpgJig against protodetentFigure 5: Jig against detent-to-be.https://chronometerbook.com/wp-content/uploads/2018/09/detent-spring-jig-2.jpgDetent Spring Jig 2Figure 4: Jig drawing.https://chronometerbook.com/wp-content/uploads/2018/09/tims-detent.jpgTims detentFigure 1: Part-finished M21 detent (Courtesy of Tim White).https://chronometerbook.com/wp-content/uploads/2018/09/detent-section1.jpgDetent sectionFigure 2: MX6 detent section. Spring (green) not to scale.https://chronometerbook.com/wp-content/uploads/2018/09/detent-section.jpgDetent sectionFigure 2: MX6 detent section. Spring (green) not to scale.https://chronometerbook.com/wp-content/uploads/2018/09/copy-of-einheitschronometer-drwg.jpgCopy of Einheitschronometer drwgFigure 1: Arrangement of Einheits-Chronometer detent.2018-09-26T03:38:12+00:00monthlyhttps://chronometerbook.com/2018/02/14/31-an-eight-day-chronometer/https://chronometerbook.com/wp-content/uploads/2018/02/copy-of-10-john-carter-738.jpgCopy of 10 John Carter 738Figure 8: Balance wheel.https://chronometerbook.com/wp-content/uploads/2018/02/11-john-carter-738.jpg11 John Carter 738Figure 9: Maintaining power.https://chronometerbook.com/wp-content/uploads/2018/02/10-john-carter-738.jpg10 John Carter 738https://chronometerbook.com/wp-content/uploads/2018/02/9-john-carter-738.jpg9 John Carter 738Figure 8: The power source.https://chronometerbook.com/wp-content/uploads/2018/02/6-john-carter-738.jpg6 John Carter 738Figure 6: Exterior of bowl and GA of movement.https://chronometerbook.com/wp-content/uploads/2018/02/5-john-carter-738.jpg5 John Carter 738https://chronometerbook.com/wp-content/uploads/2018/02/4-john-carter-738.jpg4 John Carter 738Figure 6: Face.https://chronometerbook.com/wp-content/uploads/2018/02/3-john-carter-738.jpg3 John Carter 738Figure 4: Bowl in case.https://chronometerbook.com/wp-content/uploads/2018/02/2-john-carter-738.jpg2 John Carter 738Photo 3: Side of case.https://chronometerbook.com/wp-content/uploads/2018/02/1-john-carter-738.jpg1 john carter 738Figure 2: Front of case.2018-06-30T19:51:47+00:00monthlyhttps://chronometerbook.com/2018/02/22/32-a-chipped-impulse-jewel-and-another-tale-of-woe/https://chronometerbook.com/wp-content/uploads/2018/02/20-impulse-j-reset.jpg20 Impulse j resetFigure 7: Impulse jewel refitted.https://chronometerbook.com/wp-content/uploads/2018/02/18-impulse-j-set.jpg18 Impulse j setFigure 6: Impulse jewel set into holder.https://chronometerbook.com/wp-content/uploads/2018/02/17-damaged-impulse-2.jpg17 Damaged impulse (2)Figure 5: Chipped impulse jewel.https://chronometerbook.com/wp-content/uploads/2018/02/copy-of-rollers.jpgCopy of RollersFigure 4: Roller and jewels.https://chronometerbook.com/wp-content/uploads/2018/02/detent-merged.jpgDetent mergedFigure 3: Bent detent.https://chronometerbook.com/wp-content/uploads/2018/02/holestone-damage.jpgHolestone damageFigure 2: Destroyed hole stone of balance.https://chronometerbook.com/wp-content/uploads/2018/02/copy-of-fusee-damage.jpgCopy of Fusee damageFigure 1: Damaged chain track of fusee.2018-02-22T01:20:02+00:00monthlyhttps://chronometerbook.com/2018/02/06/30-a-new-escape-wheel-for-m21-chronometer/https://chronometerbook.com/wp-content/uploads/2018/02/21-teeth-compared.jpg21 Teeth comparedFigure 17: New (right) and old (right) wheel finish compared.https://chronometerbook.com/wp-content/uploads/2018/02/16-replace-on-arbor.jpg16 Replace on arborFitting an escape wheel to its arbor.https://chronometerbook.com/wp-content/uploads/2018/02/15-group-finished.jpg15 Group finishedFigure 16: A compendium of escape wheels.https://chronometerbook.com/wp-content/uploads/2018/02/14-polish-teeth.jpg14 Polish teethFigure 15: Polishing acting surface of toothhttps://chronometerbook.com/wp-content/uploads/2018/02/13-sawed.jpg13 SawedFigure 14, ready to file again.https://chronometerbook.com/wp-content/uploads/2018/02/12-sawing.jpg12 SawingFigure 13: Crossing out with saw.https://chronometerbook.com/wp-content/uploads/2018/02/11-drilled-and-filed.jpg11 Drilled and filedFigure 12: Preliminary filing completed.https://chronometerbook.com/wp-content/uploads/2018/02/10-extend-hole.jpg10 Extend holeFigure 11: Preliminary filing to lines.https://chronometerbook.com/wp-content/uploads/2018/02/9-drilled.jpg9 DrilledFigure 10: ready for crossing out.https://chronometerbook.com/wp-content/uploads/2018/02/8-marking-out-1.jpg8 Marking out 1Figure 8: Marking out jig.2018-02-07T18:20:01+00:00monthlyhttps://chronometerbook.com/2018/01/03/29-more-on-tipsy-keys/https://chronometerbook.com/wp-content/uploads/2018/01/compendium.jpgCompendiumFigure 14: Two new and two old.https://chronometerbook.com/wp-content/uploads/2018/01/6-mill-shaft-tooth.jpg6 Mill shaft toothFigure 13: Milling teeth on shaft.https://chronometerbook.com/wp-content/uploads/2018/01/5-mill-knob-tooth.jpg5 Mill knob toothFigure 12: Clutch tooth being formed.https://chronometerbook.com/wp-content/uploads/2018/01/4-template.jpg4 TemplateFigure 11: Using template to mark out for sawing to shape.https://chronometerbook.com/wp-content/uploads/2018/01/3-mill-flat-1.jpg3 Mill flat 1Figure 10: Milling flats.https://chronometerbook.com/wp-content/uploads/2018/01/2-2-knob-turn.jpg2.2 Knob turnFigure 10: Turning diameters of knob.https://chronometerbook.com/wp-content/uploads/2018/01/knob-drrwg1.jpgKnob drrwgFigure 9: Knob drawing.https://chronometerbook.com/wp-content/uploads/2018/01/2-1-body-turn.jpg2.1 Body turnFigure 8: Generating conical shape.https://chronometerbook.com/wp-content/uploads/2018/01/2-counterbore-8.jpg2 Counterbore 8Figure 6: 8 mm hole counter-bored.https://chronometerbook.com/wp-content/uploads/2018/01/tipsy-key-shaft-drwg.jpgTipsy key shaft drwgFigure 3: Drawing of shaft.2018-01-03T18:21:17+00:00monthlyhttps://chronometerbook.com/2017/11/24/28-a-tale-of-woe-that-ended-well/https://chronometerbook.com/wp-content/uploads/2017/11/case-open-from-l1.jpgCase open from LFigure 4: Chronometer in new home.https://chronometerbook.com/wp-content/uploads/2017/11/case-3-4ths-view1.jpgCase 3 4ths viewFigure 3: Exterior of new case.https://chronometerbook.com/wp-content/uploads/2017/11/broken-chain-labelled1.jpgBroken chain labelledFigure 1: Broken and short chain.https://chronometerbook.com/wp-content/uploads/2017/11/straighten-spring-001.jpgStraighten spring 001Figure 1: Technique to straighten spring.2017-12-25T01:44:22+00:00monthlyhttps://chronometerbook.com/contact-me/https://chronometerbook.com/wp-content/uploads/2013/03/pukenui1.jpgPukenuiPukenui in the Real Far Northhttps://chronometerbook.com/wp-content/uploads/2013/03/pukenui.jpgPukenuiPukenui on the Houhora Harbour in the Real Far North2018-04-24T23:10:14+00:00weekly0.6https://chronometerbook.com/2017/01/22/25making-a-four-orbit-face-and-motion-work/https://chronometerbook.com/wp-content/uploads/2017/01/face-corrected-001.jpgface-corrected-001Figure : Face fitted.https://chronometerbook.com/wp-content/uploads/2017/01/mx6-motion-work1.jpgmx6-motion-workFigure 4: Motion work of MX6 four orbit chronometer (Tim Schultz)https://chronometerbook.com/wp-content/uploads/2017/01/new-face.jpgnew-faceFigure 13: Final result.https://chronometerbook.com/wp-content/uploads/2017/01/blank-face.jpgblank-faceFigure 11: Face ready to fit.https://chronometerbook.com/wp-content/uploads/2017/01/gears-plan.jpggears-planFigure 11: Plan view of new motion work.https://chronometerbook.com/wp-content/uploads/2017/01/punch-mark1.jpgpunch-markFigure 10: Marking for centres.https://chronometerbook.com/wp-content/uploads/2017/01/planting-2.jpgplanting-2Figure 8: https://chronometerbook.com/wp-content/uploads/2017/01/gears-wheel-hob.jpggears-wheel-hobFigure 7: Hobbing a batch of 84 tooth wheels.https://chronometerbook.com/wp-content/uploads/2017/01/pinion-ream.jpgpinion-reamFigure 8: Reaming a pinion.https://chronometerbook.com/wp-content/uploads/2017/01/pinion-part.jpgpinion-partFigure 7: Parting off a pinion.2017-11-30T21:20:37+00:00monthlyhttps://chronometerbook.com/2014/03/03/hamilton-m-22-chronometer-watch/https://chronometerbook.com/wp-content/uploads/2014/03/regulator1.jpgRegulatorFigure 6: M22 Micro-regulator.https://chronometerbook.com/wp-content/uploads/2014/03/gimbals-e1393817634988.jpgGimbalsFigure 14: Gimbals (Photo Peter Baylis).https://chronometerbook.com/wp-content/uploads/2014/03/winding-and-setting-diagram.jpgWinding and setting diagramFigure 10: Winding and setting diagram (BuShips, 1948).https://chronometerbook.com/wp-content/uploads/2014/03/planetry-gear-winding.jpgPlanetry gear windingFigure 10: Wind indicator mechanism.https://chronometerbook.com/wp-content/uploads/2014/03/safety-setting-12.jpgSafety setting 1Figure 9: Safety setting lever in place.https://chronometerbook.com/wp-content/uploads/2014/03/setting-002.jpgSetting 002Figure 7: Safety setting button of M22 watch.https://chronometerbook.com/wp-content/uploads/2014/03/setting-001.jpgSetting 001Figure 7: Setting lever of Waltham Vanguard watch.https://chronometerbook.com/wp-content/uploads/2014/03/power-time-graph1.jpgPower time graphFigure 3: Idealised power-time graph of mainsprings.https://chronometerbook.com/wp-content/uploads/2014/03/case-front2-e1393796402905.jpgCase frontFigure 13: Front of case (photo Peter Baylis).https://chronometerbook.com/wp-content/uploads/2014/03/ga-e1393796351239.jpgGAFigure 2 : Gimballed M22 watch2017-10-24T22:23:15+00:00monthlyhttps://chronometerbook.com/2016/02/01/turning-a-chronometer-balance-staff/https://chronometerbook.com/wp-content/uploads/2016/02/13-parts.jpg13 PartsFigure 13: Finished staff with parts to be mounted on it.https://chronometerbook.com/wp-content/uploads/2016/02/11-burnish-end.jpg11 Burnish endFigure 11: Jacot tool set up to burnish end of pivot.https://chronometerbook.com/wp-content/uploads/2016/02/10-burnisher-use.jpg10 Burnisher useFigure 10: Burnisher in use.https://chronometerbook.com/wp-content/uploads/2016/02/9-jacot-close-up.jpg9 Jacot close upFigure 10: Close up of Jacot tool.https://chronometerbook.com/wp-content/uploads/2016/02/8-jacot-g-a.jpg8 Jacot g aFigure 9: General arrangement of a Jacot tool.https://chronometerbook.com/wp-content/uploads/2016/02/7-balance-collet-fit.jpg7 Balance collet fitFigure 8: Balance collet on its taper.https://chronometerbook.com/wp-content/uploads/2016/02/centre1.jpgCentreFigure 7: Diagram of piviot (left) in lathe female centre (right)https://chronometerbook.com/wp-content/uploads/2016/02/centre.jpgCentreFigure 7: Diagram of pivot (left) in female centre (right).https://chronometerbook.com/wp-content/uploads/2016/01/copy-of-6-finishturn-collet.jpgCopy of 6 Finishturn colletFigure 6: Turning between centres for collet seat.https://chronometerbook.com/wp-content/uploads/2016/01/5-finished-rough-turn.jpg5 Finished rough turnFigure 5: Rough turning completed.2017-07-03T20:45:59+00:00monthlyhttps://chronometerbook.com/2017/02/13/27-fusee-chain-substitute/https://chronometerbook.com/wp-content/uploads/2017/02/ends-001.jpgends-001Figure 1: Stainless steel trace (left and centre) and multi-stranded flexible steel (right)https://chronometerbook.com/wp-content/uploads/2017/02/attach-to-fusee-1.jpgattach-to-fusee-1Figure 3: Attachment of cable to modified fusee hook.https://chronometerbook.com/wp-content/uploads/2017/02/attach-to-barrel1.jpgattach-to-barrelFigure 2: Attachment of cable to the barrel hook.2017-03-26T04:50:32+00:00monthlyhttps://chronometerbook.com/2016/06/20/22-making-a-spring-detent-for-an-mx6-soviet-chronometer/https://chronometerbook.com/wp-content/uploads/2016/06/on-carrier.jpgOn carrierFigure 14: Finished detent in support blockhttps://chronometerbook.com/wp-content/uploads/2016/06/pins-drive.jpgPins driveFigure 12: Driving home taper pins.https://chronometerbook.com/wp-content/uploads/2016/06/harden-device.jpgHarden deviceFigure 12: Hardening container.https://chronometerbook.com/wp-content/uploads/2016/06/kasenit.jpgOLYMPUS DIGITAL CAMERAFigure 11: Hardening jig with tempering tell-tale.https://chronometerbook.com/wp-content/uploads/2016/06/harden-jig.jpgHarden jigFigure 10: Jig to prevent distortion.https://chronometerbook.com/wp-content/uploads/2016/06/detent-2-012.jpgDetent 2 012Figure 9: Detent held in swing tool to file spring.https://chronometerbook.com/wp-content/uploads/2016/06/milling.jpgMillingFigure 5: Milling nearing completion.https://chronometerbook.com/wp-content/uploads/2016/06/detent-section5.jpgDetent sectionFigure 2: Section through detent.https://chronometerbook.com/wp-content/uploads/2016/06/detent-plan4.jpgDetent planFigure 1: G.A. of detent.https://chronometerbook.com/wp-content/uploads/2016/06/sawn-out-2.jpgSawn out 2Figue 8: Detent separated from parent metal.2017-01-30T08:15:28+00:00monthlyhttps://chronometerbook.com/2017/01/24/26-making-a-hole-stone/https://chronometerbook.com/wp-content/uploads/2017/01/hole-stone.jpghole-stoneFigure 1: Sketch of MX6 chronometer hole stone.https://chronometerbook.com/wp-content/uploads/2017/01/combined-finish.jpgOLYMPUS DIGITAL CAMERAFigure 10: The finished stone.https://chronometerbook.com/wp-content/uploads/2017/01/7-drill-0-2-mm.jpg7-drill-0-2-mmFigure 9; (Drilling with 0,20 mm carbide drill.https://chronometerbook.com/wp-content/uploads/2017/01/measure-003.jpgmeasure-003Figure 6: Measuring thickness of the blank.https://chronometerbook.com/wp-content/uploads/2017/01/6-drill-1-mm.jpg6-drill-1-mmFigure 8: Drilling with 1 mm carbide drill.https://chronometerbook.com/wp-content/uploads/2017/01/5-face-blank.jpg5-face-blankFigure 2: Facing end of the blank.https://chronometerbook.com/wp-content/uploads/2017/01/4-make-spcket.jpg4-make-spcketFigure 5: Drilling a socket.https://chronometerbook.com/wp-content/uploads/2017/01/3-part-off.jpg3-part-offFigure 4: Parting off.https://chronometerbook.com/wp-content/uploads/2017/01/2-excavate-end.jpg2-excavate-endFigure 3: Excavating annulus.https://chronometerbook.com/wp-content/uploads/2017/01/1-face-end.jpg1-face-endFigure 6: Facing underside of blank.2017-01-25T04:42:36+00:00monthlyhttps://chronometerbook.com/2016/12/27/24making-a-tungsten-carbide-locking-stone/https://chronometerbook.com/wp-content/uploads/2016/12/finished-stone.jpgfinished-stoneFigure 7: Finished locking stone in place.https://chronometerbook.com/wp-content/uploads/2016/12/lap-in-use.jpglap-in-useFigure 5: Lap in use.https://chronometerbook.com/wp-content/uploads/2016/12/lap-layout.jpglap-layoutFigure 4: Supporting the work piece.https://chronometerbook.com/wp-content/uploads/2016/12/cut-off.jpgcut-offFigure 3: Cutting off.https://chronometerbook.com/wp-content/uploads/2016/12/locking-stone-003.jpglocking-stone-003Figure 2: Grinding set-up.https://chronometerbook.com/wp-content/uploads/2016/12/old-stone-2.jpgold-stone-2Figure 1: Damaged detent.2017-01-18T08:39:17+00:00monthlyhttps://chronometerbook.com/2016/04/22/21-a-balancing-act/https://chronometerbook.com/wp-content/uploads/2016/04/stopping-balance-for-transport-001.jpgstopping-balance-for-transport-001Figure 5: Blocking balance wheel.https://chronometerbook.com/wp-content/uploads/2016/04/brush-stop.jpgBrush stopFigure 4: Stopping balance with a brush.https://chronometerbook.com/wp-content/uploads/2016/04/cylinders-003.jpgCylinders 003Figure 3: 3.2 mm weight (fitted) with 3 mm weight alongside.https://chronometerbook.com/wp-content/uploads/2016/04/tap.jpgTapFigure 2: Metric no 1 tap.https://chronometerbook.com/wp-content/uploads/2016/04/sleeves-001.jpgSleeves 001Figure 1: Close up view of sleeves.2017-12-02T06:13:59+00:00monthlyhttps://chronometerbook.com/2016/12/27/23-an-improvised-let-down-tool/https://chronometerbook.com/wp-content/uploads/2016/12/key-holder-001.jpgkey-holder-001Figure 2: Finished let down tool..https://chronometerbook.com/wp-content/uploads/2016/12/key-holder.jpgkey-holderFigure 1: Key holder sketch.2016-12-27T03:43:51+00:00monthlyhttps://chronometerbook.com/2015/07/27/15-replacing-a-locking-jewel/https://chronometerbook.com/wp-content/uploads/2015/07/replacement-004.jpgReplacement 004Figure 6: Work-aid for re-attaching passing spring.https://chronometerbook.com/wp-content/uploads/2015/07/replacement-003.jpgReplacement 003Figure 5: Securing jewel with shellac.https://chronometerbook.com/wp-content/uploads/2015/07/escapement-drwg.jpgEscapement drwgFigure 3: Escapement drawing.https://chronometerbook.com/wp-content/uploads/2015/07/replacement-006.jpgReplacement 006Figure 2: Copper wire wedge.https://chronometerbook.com/wp-content/uploads/2015/07/copy-of-replacement-001.jpgCopy of Replacement 001Figure 1: Broken jewel removed.2016-10-08T20:43:17+00:00monthlyhttps://chronometerbook.com/2013/09/29/10-refinishing-dials/https://chronometerbook.com/wp-content/uploads/2013/09/dials-006.jpgDials 006https://chronometerbook.com/wp-content/uploads/2013/09/dials-005.jpgDials 005Figure 3: Silvering half completed.https://chronometerbook.com/wp-content/uploads/2013/09/dials-004.jpgDials 004https://chronometerbook.com/wp-content/uploads/2013/09/dials-003.jpgDials 003https://chronometerbook.com/wp-content/uploads/2013/09/dials-002.jpgDials 002Figure 2: Surplus wax scraped off.https://chronometerbook.com/wp-content/uploads/2013/09/dials-001.jpgDials 001Figure 1: Filling with sealing wax.2017-02-13T13:38:33+00:00monthlyhttps://chronometerbook.com/2013/07/30/9-making-a-chronometer-key/https://chronometerbook.com/wp-content/uploads/2013/07/parts-drwg.jpgParts drwgFigure 2: Dimensioned drawing of parts.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-013.jpgNew key 013Figure 13: The completed key.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-012.jpgNew key 012Figure 12: Exploded assembly.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-011.jpgNew key 011Figure 11: Reaming for a taper pin.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-010.jpgNew key 010Figure 10: Forming the knob.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-009.jpgNew key 009Figure 9: drilling for spring anchor.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-008.jpgNew key 008Figure 7: Taper turning nose.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-007.jpgNew key 007Figure 7: Milling slot for knob.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-006.jpgNew key 006 figure 6: Parting off.https://chronometerbook.com/wp-content/uploads/2013/07/new-key-004.jpgNew key 004Figure 5: Turning to size.2016-10-08T20:34:15+00:00monthlyhttps://chronometerbook.com/2013/07/28/7-making-a-replacement-lid-for-the-case/https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-007.jpgLid replacement 007https://chronometerbook.com/wp-content/uploads/2013/07/finished-lid-001.jpgFinished lid 001Figure 10: Finished lid in place.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-012.jpgLid replacement 012Figure 9: Corner ready to be fitted.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-011.jpgLid replacement 011Figure 8: Chisel for cutting curves.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-010.jpgLid replacement 010Figure 7: Soldering joints.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-004.jpgLid replacement 004Figure 6: Using cheater to guide file.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-008.jpgLid replacement 008Figure 5: Separating the corners with piercing saw.https://chronometerbook.com/wp-content/uploads/2013/07/lid-replacement-002.jpgLid replacement 002Figure 4: Machining grooves.https://chronometerbook.com/wp-content/uploads/2013/07/corner.jpgCornerFigure 3: Dimensions of a corner.https://chronometerbook.com/wp-content/uploads/2013/07/inside-lid-001.jpgOLYMPUS DIGITAL CAMERA2016-10-08T20:33:27+00:00monthlyhttps://chronometerbook.com/2013/03/31/in-the-beginning/https://chronometerbook.com/wp-content/uploads/2013/03/hamiltons-017.jpgHamiltons 017Figure 4: Hamilton Model 21.https://chronometerbook.com/wp-content/uploads/2013/03/copy-of-overhaul-013.jpgCopy of Overhaul 013Figure 3 : Movement out if the case.https://chronometerbook.com/wp-content/uploads/2013/03/fig-3-4.jpgFig 3.4Figure 2 : Removing movement from case.https://chronometerbook.com/wp-content/uploads/2013/03/fig-3-3.jpgFig 3.3Figure 1 : Removing the chronometer from the gimbals2016-10-08T20:30:51+00:00monthlyhttps://chronometerbook.com/2016/02/13/20-a-soviet-deck-watch/https://chronometerbook.com/wp-content/uploads/2016/02/geneva.jpgGenevaFigure 7: Geneva stop-work.https://chronometerbook.com/wp-content/uploads/2016/02/seconds.jpgSecondsFigure 6: Seconds wheel and pinion.https://chronometerbook.com/wp-content/uploads/2016/02/nardin-movement1.jpgNardin movementFigure 5: Movement of Nardin deck watch.https://chronometerbook.com/wp-content/uploads/2016/02/nardin-movement.jpgNardin movementFigure 5: Movement of Ulysse Nardin deck watch.https://chronometerbook.com/wp-content/uploads/2016/02/parts-labelled.jpgParts labelledFigure 4: The movement.https://chronometerbook.com/wp-content/uploads/2016/02/deck-watch-008.jpgOLYMPUS DIGITAL CAMERAFigure 3: Front of outer casehttps://chronometerbook.com/wp-content/uploads/2016/02/002-001.jpg002 001Figure 2: Details of face.https://chronometerbook.com/wp-content/uploads/2016/02/deck-watch-001.jpgDeck watch 001Figure 1: Deck watch in case.2017-02-13T14:54:02+00:00monthlyhttps://chronometerbook.com/2016/02/08/19-making-an-upper-balance-cock/https://chronometerbook.com/wp-content/uploads/2016/02/balance-cock-4_1.jpgBALANCE COCK 4_1Figure 9: Hamilton original (left) alongside polished new part.https://chronometerbook.com/wp-content/uploads/2016/02/finish-machined.jpgFinish machinedFigure 8: Part finish machined.https://chronometerbook.com/wp-content/uploads/2016/02/rotary-table-001.jpgRotary table 001Figure 7: Work piece mounted on rotary table.https://chronometerbook.com/wp-content/uploads/2016/02/central-pin.jpgCentral pinFigure 6: Locating pin for jewel hole, and face plate.https://chronometerbook.com/wp-content/uploads/2016/02/balance-cock-2.jpgBALANCE COCK 2Figure 5: Set up for machining curve Chttps://chronometerbook.com/wp-content/uploads/2016/02/copy-of-balance-cock-p5labelled.jpgCopy of BALANCE COCK P5labelledFigure 4 : Outline curves (Hamilton Watch Co., modified)https://chronometerbook.com/wp-content/uploads/2016/02/internal-curves.jpgInternal curvesFigure 3: Underside of Hamilton Watch Co, balance cock.https://chronometerbook.com/wp-content/uploads/2016/02/s-l1600-1.jpgs-l1600 (1)Figure 2: Ulysse Nardin balance cock.https://chronometerbook.com/wp-content/uploads/2016/02/fig-3-12.jpgFig 3.122016-02-08T22:28:21+00:00monthlyhttps://chronometerbook.com/2016/01/30/17-replacing-a-locking-jewel/https://chronometerbook.com/wp-content/uploads/2016/01/impulse-jewel-002.jpgOLYMPUS DIGITAL CAMERAOLYMPUS DIGITAL CAMERAhttps://chronometerbook.com/wp-content/uploads/2016/01/impulse-jewel-001.jpgImpulse jewel 001https://chronometerbook.com/wp-content/uploads/2016/01/impulse-jewel-003.jpgImpulse jewel 0032016-01-30T03:30:53+00:00monthlyhttps://chronometerbook.com/2013/07/22/repivoting-part-2-an-escape-wheel-arbor/https://chronometerbook.com/wp-content/uploads/2013/07/overhaul-pivots-2-010.jpgOverhaul pivots 2 010Figure 3: Hardened and tempered muff fitted to escape wheel arborhttps://chronometerbook.com/wp-content/uploads/2013/07/overhaul-pivots-2-007.jpgOverhaul pivots 2 007Figure 2: Finish turning muff.https://chronometerbook.com/wp-content/uploads/2013/07/pivots-2-drwg.jpgPivots 2 drwg2016-01-04T19:04:24+00:00monthlyhttps://chronometerbook.com/2015/05/13/14-repairing-a-damaged-barrel-arbor/https://chronometerbook.com/wp-content/uploads/2015/05/arbor-008.jpgArbor 008Figure 2 : Fracture surface.https://chronometerbook.com/wp-content/uploads/2015/05/arbor-005.jpgOLYMPUS DIGITAL CAMERAFigure 3: Producing the square.https://chronometerbook.com/wp-content/uploads/2015/05/arbor-003.jpgArbor 003Figure 5 : Finished repair. https://chronometerbook.com/wp-content/uploads/2015/05/arbor-002.jpgArbor 002Figure 4: Turning down to 3 mm.https://chronometerbook.com/wp-content/uploads/2015/05/barrel-arbor.jpgBarrel arborFigure 1: Dimensions of arbor.2015-08-29T09:56:24+00:00monthlyhttps://chronometerbook.com/2015/08/22/a-ship-wrecked-m22-chronometer-watch-restored/https://chronometerbook.com/wp-content/uploads/2015/08/copy-of-m22-2-11.jpgCopy of M22 2.1Figure 1: Watch prior to sale.https://chronometerbook.com/wp-content/uploads/2015/08/2e3234-finished-001.jpg2E3234 Finished 001Figure 12: Ready for another 74 years.https://chronometerbook.com/wp-content/uploads/2015/08/2f3234-balance.jpg2F3234 BalanceFigure 10: Balance before cleaning.https://chronometerbook.com/wp-content/uploads/2015/08/2f3234-parts.jpg2F3234 PartsFigure 9: parts and assemblies ready for cleaning.https://chronometerbook.com/wp-content/uploads/2015/08/safety-setting-labelled.jpgSafety setting labelledFigure 8: Setting and winding mechanism.https://chronometerbook.com/wp-content/uploads/2015/08/2f3234-centre-wheel.jpg2F3234 Centre wheelFigure 7: Checking centre wheel alignment between centres.https://chronometerbook.com/wp-content/uploads/2015/08/copy-of-2f3234-movement-1.jpgCopy of 2F3234 Movement 1Figure 6: Sites of rust.https://chronometerbook.com/wp-content/uploads/2015/08/2f3234-inside-dust-cover.jpg2F3234 Inside dust coverFigure 5: Corrosion products under inner back.https://chronometerbook.com/wp-content/uploads/2015/08/2e3234-001.jpg2E3234 001Figure 4: Safe removal of back.https://chronometerbook.com/wp-content/uploads/2015/08/2f3234-dust-cover.jpg2F3234 Dust coverFigure 6: How to remove snap-off back.2015-08-29T09:52:50+00:00monthlyhttps://chronometerbook.com/buy-the-book/2015-06-17T05:01:17+00:00weekly0.6https://chronometerbook.com/2015/03/05/rating-a-chronometer/2017-02-13T12:08:45+00:00monthlyhttps://chronometerbook.com/2014/12/09/hamilton-navigational-master-watch/https://chronometerbook.com/wp-content/uploads/2014/12/4992b-new-case-3.jpg4992b new case 3Figure 6: Naval-type outer case.https://chronometerbook.com/wp-content/uploads/2014/12/nasm2012-02164-case.jpgnasm2012-02164 caseFigure 5: Outer case for aircraft use (Courtesy of Smithsoniam Museum)https://chronometerbook.com/wp-content/uploads/2014/12/4-4992b-stopwork-22.jpg4. 4992b stopwork 2Figure 4: Hacking mechanism.https://chronometerbook.com/wp-content/uploads/2014/12/3-4992b-regulator.jpg3 4992b regulatorFigure 3: Regulator.https://chronometerbook.com/wp-content/uploads/2014/12/2-movement-ga.jpg2 Movement GAFigure 2: General arrangement of the movement.https://chronometerbook.com/wp-content/uploads/2014/12/face-001.jpgFace 001Figure 1: Face (bezel and crystal removed)https://chronometerbook.com/wp-content/uploads/2014/12/1-4992b-face.jpg1 4992b faceFigure 1: Face of watch.2014-12-13T00:23:21+00:00monthlyhttps://chronometerbook.com/about-the-author/https://chronometerbook.com/wp-content/uploads/2013/03/authorpics-003.jpgAuthorpics 003Bill Morris with a 1942 Wempe chronometerhttps://chronometerbook.com/wp-content/uploads/2013/03/copy-of-author-006.jpgCopy of author 006Bill Morris with a Wempe chronometer2016-05-12T10:04:49+00:00weekly0.6https://chronometerbook.com/2013/06/09/re-pivoting-a-balance-staff/https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-006.jpgCopy of Repivot 006Figure 6: Support for the pivot while being burnished.https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-005.jpgCopy of Repivot 005Figure 5: Turning down pinion wire.https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-004.jpgCopy of Repivot 004Figure 4 : Drilling to size.https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-003.jpgCopy of Repivot 003Figure 3: Centring end of staff.https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-0021.jpgCopy of Repivot 002Figure 3 : Centring end of staff.https://chronometerbook.com/wp-content/uploads/2013/06/copy-of-repivot-002.jpgCopy of Repivot 002Figure 2 : Facing end of staff.2013-10-04T19:31:11+00:00monthlyhttps://chronometerbook.com/2013/04/16/5-replacing-a-balance-staff/https://chronometerbook.com/wp-content/uploads/2013/04/6-discharge-pallet.jpg6 Discharge palletFigure 6: Impulse roller and jewel.https://chronometerbook.com/wp-content/uploads/2013/04/10-balance-poised1.jpg10 Balance poisedFigure 9: Poising the balance.https://chronometerbook.com/wp-content/uploads/2013/04/10-balance-poised.jpg10 Balance poisedhttps://chronometerbook.com/wp-content/uploads/2013/04/9-check-impulse-jewel.jpg9 Check impulse jewelhttps://chronometerbook.com/wp-content/uploads/2013/04/8-rollers-replaced.jpg8 Rollers replacedhttps://chronometerbook.com/wp-content/uploads/2013/04/7-roller-removal.jpg7 Roller removalFigure 7: Roller removal.https://chronometerbook.com/wp-content/uploads/2013/04/5-measure-staff.jpg5 Measure staffFigure 3: Checking new staff for length.https://chronometerbook.com/wp-content/uploads/2013/04/2-sketch-2-002.jpg2 Sketch 2 002Figure 5: Angular positions of impulse and discharge jewels.https://chronometerbook.com/wp-content/uploads/2013/04/1-sketch-1.jpg1 Sketch 1Figure 4: Angular position of balance springhttps://chronometerbook.com/wp-content/uploads/2013/04/4-cut-pivot.jpg4 Cut pivotFigure 1 : Cut pivot2017-11-24T09:30:03+00:00monthlyhttps://chronometerbook.com/2013/04/12/4-hamilton-model-21-escapement/https://chronometerbook.com/wp-content/uploads/2013/04/m21_detent.jpgM21_detentFigure 3: Model 21 detent.https://chronometerbook.com/wp-content/uploads/2013/04/hamilton-21-escapement-3.jpgHamilton 21 escapement 3Figure 1: Plan view of escapement (After Rawlings)https://chronometerbook.com/wp-content/uploads/2013/04/hamilton-21-collet-and-stud.jpgHamilton 21 collet and studhttps://chronometerbook.com/wp-content/uploads/2013/04/hamilton-21-balance-wheel.jpgHamilton 21 balance wheelhttps://chronometerbook.com/wp-content/uploads/2013/04/hamilton-21-balance-hub.jpgHamilton 21 balance hubhttps://chronometerbook.com/wp-content/uploads/2013/04/ham-21-escapement.jpegHam 21 escapementhttps://chronometerbook.com/wp-content/uploads/2013/04/ham-21-escapement-2.jpgHam 21 escapement 2https://chronometerbook.com/wp-content/uploads/2013/04/ham-21-escapement-2-captions.jpgHam 21 escapement 2 captionsFigure 2: Perspective diagram of escapement2013-06-11T00:09:21+00:00monthlyhttps://chronometerbook.com/2013/04/11/3-hamilton-model-21-chronometer-getting-started/https://chronometerbook.com/wp-content/uploads/2013/04/hamiltons-017.jpgHamiltons 017Figure 3: The locking fork.https://chronometerbook.com/wp-content/uploads/2013/04/hamiton-fork.jpgHamiton forkFigure 4: Attachment of the locking mechanismhttps://chronometerbook.com/wp-content/uploads/2013/04/hamilton-004.jpgHamilton 004https://chronometerbook.com/wp-content/uploads/2013/04/hamilton-003.jpgOLYMPUS DIGITAL CAMERAhttps://chronometerbook.com/wp-content/uploads/2013/04/hamilton-002.jpgHamilton 002https://chronometerbook.com/wp-content/uploads/2013/04/locking-arm.jpegLocking armFigure 1: Balance locking arm2013-04-11T04:03:34+00:00monthlyhttps://chronometerbook.com/2013/03/31/2-getting-started/https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-0041.jpgGetting started 004Figure 5 : Winding the chronometerhttps://chronometerbook.com/wp-content/uploads/2013/03/getting-started-009.jpgGetting started 009Figure 6 : Duh!https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-0081.jpgGetting started 008https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-007.jpgGetting started 007https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-006.jpgGetting started 006Figure 7 ; Corking (or uncorking) a balance.https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-005.jpgOLYMPUS DIGITAL CAMERAhttps://chronometerbook.com/wp-content/uploads/2013/03/getting-started-004.jpgGetting started 004https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-003.jpgGetting started 003https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-0021.jpgGetting started 002Figure 4 : Dust cover and key hole revealed.https://chronometerbook.com/wp-content/uploads/2013/03/getting-started-001.jpgGetting started 001Figure 3 : Unlocking the gimbals.2014-04-04T01:02:02+00:00monthlyhttps://chronometerbook.comdaily1.02020-10-03T22:34:30+00:00